A thumb-sucking appliance may be considered in some situations after assessment and discussion with the child. Available studies mainly concern fixed appliances fitted by a practitioner. They do not prove that an appliance bought online will stop sucking.
Start by understanding the habit
Thumb sucking may occur at different times: tiredness, falling asleep, concentration or seeking comfort. For a few days, observe the circumstances without repeated comments. The goal is a useful discussion with the child and professional, not constant monitoring of the child's mouth.
Prolonged sucking is associated with certain bite abnormalities; duration is among the factors affecting risk. The association alone cannot predict the condition of a child's teeth. 2016 systematic review.
Support before and during possible appliance use
Encouragement and positive reinforcement are among the approaches studied. The Cochrane review observes favourable results for some interventions, but with low-certainty evidence and small trials. It should not be turned into an infallible recipe.
Agree on a simple goal the child accepts. Ask what would help at the most difficult moment. A progress chart can offer support if it values effort and does not turn a setback into failure. Discuss difficulties you cannot resolve with the practitioner.
A punitive, humiliating approach or one imposed without explanation does not fit this support. If selected, the device should have a goal the child understands.
Which appliances have been evaluated?
The Cochrane review concerns orthodontic devices such as palatal cribs or arches. Findings suggest they may help some children stop sucking. However, all included trials have a high risk of bias. Borrie et al., 2015.
The professional chooses the device for the situation and monitors tolerance. An appliance does not remove the need to discuss when the habit returns or arrange checks.
This review's evidence does not extend to validating a glove, an online accessory or a prefabricated appliance. For each, ask what has actually been studied.
Check the bite too
Stopping sucking and changes in the teeth are separate questions. Some changes can persist after stopping, as observed in a cohort of children followed from birth. Examination remains useful even when the child no longer sucks their thumb.
If the incisors do not meet on closure, our guide to open bite explains what assessment aims to distinguish. Sucking is not a sufficient explanation for every case.
Points to clarify before fitting
- Why propose an appliance now?
- Which exact device will be used?
- How will the child participate in the approach?
- Which discomfort should prompt a call to the practice?
- What is the review and reassessment schedule?
- How will the teeth be monitored after sucking stops?
The Myoforce appliance is presented for tongue retraining; no study in the MyoForce file demonstrates that it stops thumb sucking. If tongue function also needs work, clarify that indication separately.
Common questions
At what age should a thumb-sucking appliance be fitted?
No single age is enough to decide. Assessment considers dentition, bite, persistence of the habit and the child's participation.
Do teeth need treatment as soon as thumb sucking stops?
This depends on examination and subsequent changes. Stopping the habit alone does not determine the need for orthodontic treatment.
Sources and review
Guide reviewed on 1 October 2026 by Dr Vladimir Khourda. The references below concern the topics studied; they do not establish the results of a MyoForce product.